History of the human body / by Harris Hawthorne Wilder.

  • Harris Hawthorne Wilder
Date:
1909
Catalogue details

Licence: Public Domain Mark

Credit: History of the human body / by Harris Hawthorne Wilder. Source: Wellcome Collection.

    575/620 (page 541)
    Sub-Order 10. Lophobranchii (sea-horse; pipe¬ fish) . Sub-Order 11. Hemibranchii (stickleback). Sub-Order 12. Acanthopteri (mackerel; cod; perch; sculpin; flounder). Sub-Order 13. Pediculati (angler-fish; frog-fish). [In the Class of Pisces the process of extinction has left in our modern fauna five more or less isolated groups, usually treated as Orders. These are the Selachii, Holo- cephali, Dipnoi, Ganoidei and Teleostei. The first is the only remaining group of the elasmobranchs of the second and third the only fossils known are much like those of the present day and their affinities have thus not been definitely traced; and the fourth and fifth are respectively the earlier and later types of teleostomes. The living ganoids are very few in number and are for the most part unrelated to one another. There are but two crossoptergyians, and but one or two living genera of each of the three groups Chondrostei, Protospon- dyli, and TEtheospondyli. At this point the “ ganoids ” are considered to end, and the remaining Sub-orders, be¬ ginning with the Isospondyli, are included with the tele- osts (i. e. Teleostei, to be carefully distinguished from Teleostomi, the larger group). Sub-orders 4-8 are sometimes grouped as the Physostomi ,and the remaining sub-orders, 5-13, as the Physoclysti. In the former of these the air-bladder retains its connec¬ tion with the alimentary canal; in the latter this becomes lost during development and the air-bladder is a closed sac.] Class II. Amphibia (Batrachia). Order 1. Urodela. Sub-Order 1. Perennibranchiata (Necturus; Si¬ ren). Sub-Order 2. Derotremata (Cryptobranchus). Sub-Order 3. Salamandrida (newts; salaman¬ ders). Order 2. Gymnophiona (subterranean forms, with¬ out limbs or eyes). Order 3. Anura. Sub-Order 1. Aglossa * (Surinam toad). Sub-Order 2. Arcifera (toads; tree-toads). Sub-Order 3. Firmisternia (frogs).